Final answer:
The atomic core for potassium, written as K+, consists of 19 protons and 18 electrons. Chloride, written as Cl−, contains 17 protons and 18 electrons due to the gain of one extra electron. Standard notations for these elements are 'K' for potassium and 'Cl' for chlorine.
Step-by-step explanation:
The atomic core for potassium (K) ion and chloride (Cl) ion consists of the potassium having lost one electron to form a positively charged ion, often represented as K+, while a chloride ion is formed when a chlorine atom gains an electron becoming Cl−.
Potassium's atomic number is 19, which means it has 19 protons and, when neutral, 19 electrons. Chlorine, on the other hand, has an atomic number of 17, implying it has 17 protons and, when neutral, 17 electrons. However, as a chloride ion, it gains an extra electron for a total of 18 electrons, thus carrying a negative charge.
In standard notation:
- Potassium (K)
- Chlorine (Cl)
For the chloride ion Cl−:
- Protons: 17
- Neutrons: It varies according to the isotope.
- Electrons: 18